Caitlyn Jenner has been promoting her new memoir The Secret Of My Life: A History, and as the title suggests lifting the lid on a few family secrets in the process.

Amid the most controversial claims in the book are Caitlyn's claims about ex-wife Kris Jenner and step daughter Khloe Kardashian. Regarding Kris, Caitlyn says the matriarch knew O.J Simpson was guilty during the trial in which Rob Kardashian worked on the defense team. The 67-year-old's confession about her relationship with Khloe is heartbreaking, claiming the reality star hasn't spoken to her in two years.

“I don’t know. She doesn’t want to talk to me either,” Caitlyn told Andy Cohen during her recent radio interview. “She hasn’t talked to me in about two years. That’s sad. I was very very close to Khloe. I had 23 years of raising her. I met Khloe when she was 5 years old.”

The strain is taking it's toll on Caitlyn, she says "Of course, it hurts. She was on Howard Stern and called me a liar and that kind of pissed me off too because I never lied to her. If I didn’t tell her everything…first of all, she never asked.”

Arielle TsoukatosArielle is our Senior Digital Beauty & Lifestyle Editor. A few career highlights include; lunch with Kim Cattrall, interviewing Naomi Watts and swapping make-up tips with Margot Robbie on the red carpet. You can find her words on InStyle, marie claire and Women's Health.